refactor: improve OpenAI service and tools

- Enhance OpenAI message types with tool_calls support
- Improve security validation and rate limiting
- Update utility tools and weather tool
- Minor fixes in deposit-agent and domain-register

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/tools/weather-tool.ts

@@ -2,6 +2,9 @@
 import type { Env } from '../types';
 import { retryWithBackoff } from '../utils/retry';
 import { ERROR_MESSAGES } from '../constants/messages';
+import { createLogger } from '../utils/logger';
+
+const logger = createLogger('weather');
 
 // wttr.in API 응답 타입 정의
 interface WttrCurrentCondition {
@@ -87,6 +90,7 @@ export async function executeWeather(args: { city: string }, env?: Env): Promise
 습도: ${current.humidity}%
 풍속: ${current.windspeedKmph} km/h`;
   } catch (error) {
+    logger.error('날씨 조회 실패', error as Error, { city });
     return `${ERROR_MESSAGES.WEATHER_SERVICE_UNAVAILABLE}: ${city}`;
   }
 }